Gustavus g



(No Model.)-

G. G. WAGNER.

Indicating Time By Gas Pressure.

No. 234,358. Patented Nov. 9,1880,

-FETERS, PHOTO-LITHOGRAFHER WASHINGTON. I: C.

UNITED STATES GUSTAVUS Gr. WAGNER, OF NElV YORK, N.

PATENT amen,

INDICATING TIME BY GAS-PRESSURE.

SPECIFICATION formingpart of Letters Patent No. 234,358, dated November9, 1880.

Application filed April 7, 1880.

To all whomit may concern Be it known that I, GUSTAVUS Gr. \VAGNER, acitizen of the United States, residing at New York, in the county andState of New York, have invented new and useful Improvements inIndicating Time, of which the following is a specification.

The general object of this invention is to utilize the pressure of gasin the street gasinains of a city or town for the purpose of indicatingto the inhabitants certain periods of time, as the hours or half-hours,such time being determined at the gas-works.

This invention is illustrated in the accompanying drawing, which showsthe apparatus generally employed. t

The letter A designates a gas-main, which extends from thegas-reservoir, a portion of which is shown at B, and the major part ofwhich is laid down in the streets of a city or town, as well known.

0 designates a service-pipe, whereby gas is conveyed from the gas-mainto abuilding; and D a gas-pressure indicator, connected to the gas-mainthrough the medium of the servicepipe, such indicator being in mostcases located within the building. This gas-pressure indicator may beconstructed in a variety of ways well known to those skilled in the art,and needs no description.

In carrying out my invention the indicator D is so arranged that itbecomes set in an intelligible manner when the pressure of the gas inthe gas-main rises to a degree above or beyond the maximum normalpressure-namely, the pressure required to supply the city or town withgas for illuminating purposesthat is to say, the indicator isnecessarily thus arranged, whereas it is optional to arrange the same toshow also a lower degree of pressure.

At intervals of anhour, a half-hour, or any other period thatcircumstances or convenience may dictate, I increase the pressure of thegas in the gas-main A to a degree above the maximum normal pressuretherein by letting on an additional quantity of gas from the reservoir;and since the indicator D is set by that means the same is practically atime-piece corresponding to the one whereby the periods at which thegas-pressure is increased is de- (No model.)

termined. Hence if a number of pressure-indicators corresponding to thisindicator D are distributed throughout a city or town the measure oftime at the gas-works becomes the standard for the whole of such city ortown.

In the gas-main A is arranged the usual gassupply valve E. In connectionwith this gassupply 'alve 1 use what I term a tim e-valve, F, the samebeing arranged in a branch pipe, G, which is connected to the gasmain Aon opposite sides of the gas-supply valve. This time-valve F may beconstructed in various ways, and by its means the pressure of the gas inthe gas-main A can be increased independently of the supply-valve E,making the latter a regulator merely for the normal pressure of the gas,which is a desideratum; but it is obvious that the gas-supply valve Ealso is adapted to the purpose of the time'valve F.

Vith the timevalve F, 1 connect a mechanism which is constructed to openand close the same automatically at'fixed intervals, so that thetime-valve is rendered self-acting.

A mechanism adapted to the purpose of opening and closing the time-valveF can be readily devised by a skilled mechanic, and a descriptionthereof is therefore deemed unnecessary.

The general location of the mechanism referred to is shown at G, and itsconnection with the time-valve is effected by gearing H or othersuitable means.

What I claim as new, and desire to secure by Letters Patent, is

l. The within-described method of indicating time by connecting to astreet gas-main a suitable gas-pressure indicator and increasing thepressure of the gas in such gas-main to a degree above the maximumnormal pressure therein at fixed intervals, thereby setting theindicator.

2. The combination, with a gasmuin and the gas-supply valve to suchmain, of a branch pipe connected to the gas-main on opposite sides ofthe supply-valve, a timevalve arranged in the branch pipe for thepurpose of increasing the pressure of the gas independently of thesupply-valve, and a gas-pressure indicator connected to the gas-main,substantially as described, for the purpose set forth.

3. The combination, \vithagas-inain and the stantially as described, forthe purpose set gas-supply valve to such main, of a branch forth. pipeconnected to the gas-main on opposite In testimony whereof I havehereunto set sides of the supply-valve, a time-Valve army hand and sealin the presence of two sub- 5 ranged in the branch pipe for the purposeof scribing witnesses.

increasing the pressure of the gas independ- GUSTAVUS G WAGNER.

cntly of the supply-valve, a mechanism con- 1 structed to automaticallyopen and close the WVitnesses: tiinc-"alve at fixed intervals, and agas-press- \V. HAUFF,

10 we indicator connected to the gas-main, sub- CHAS. VVAHLERS. J

